"The East Building will come alive during National Gallery Nights programs on September 14, October 12, and November 9. National Gallery of Art, Washington" From the National Gallery of Art: "National Gallery Nights, our popular after-hours program, returns to the East Building from 6:00 to 9:
source https://www.popville.com/2023/08/national-gallery-nights-returns-for-fall-2023-season-with-outdoor-programming-and-new-themes/